Former New Mexico Gov. Bill Richardson is heading to Texas to campaign on behalf of Hillary Clinton.

A spokeswoman for Richardson said the Democrat is scheduled to speak Monday at an immigration forum in San Antonio hosted by Clinton. He is then slated to address volunteers at a Clinton phone bank and will tour local businesses.

Richardson announced in August he would support the former Secretary of State said after speaking with her and former President Bill Clinton. He said they had "patched up" disagreements from the 2008 election.

The former governor, who served in Clinton's administration, had endorsed then Sen. Barack Obama during the 2008 Democratic primary campaign.